Preheat oven to 375°F (190°C). Line an 8×8-inch baking pan with parchment paper, leaving an overhang for easy removal.
Spread the chopped almonds, slivered almonds, and coconut flakes each on their own small baking sheet.
Toast the coconut flakes 2–4 minutes until lightly golden, the slivered almonds 3–5 minutes, and the chopped almonds 7–12 minutes; watch closely to avoid burning. Remove and let cool completely.
Reduce oven temperature to 350°F (175°C).
In a large bowl, whisk together the egg and monk fruit sweetener until combined.
In a small microwave-safe bowl, microwave the almond butter and coconut oil about 30 seconds until melted and smooth, then whisk into the egg mixture.
Add the toasted chopped almonds, toasted slivered almonds, toasted coconut flakes, and sea salt to the wet mixture. Stir until evenly combined, then fold in the stevia-sweetened chocolate chips.
Press the mixture very firmly and evenly into the prepared 8×8 pan so the bars will hold together.
Bake at 350°F (175°C) until the top is just set, about 15 minutes. Remove and cool completely in the pan on a wire rack.
Once cool, use the parchment overhang to lift the block from the pan and slice into 12 bars.